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Mammals of the Jordan River Compiled by Dan Potts, Local Naturalist, 2011

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Mammals of the Jordan River Compiled by Dan Potts, Local Naturalist, 2011 Mammals of the Jordan River compiled by Dan Potts, local naturalist, 2011 SHREWS ( SORICIDAE) Masked Shrew Sorex cinereus common Preble’s Shrew Sorex preblei uncommon Vagrant Shrew Sorex vagrans common EVENING BATS (VESPERTILIONIDAE) Little brown bat Myotis lucifugus common California bat Myotis californicus stephensi uncommon Fringed bat Myotis thysanodes uncommon Long-eared bat Myotis evotis evotis uncommon Long-legged bat Myotis volans interior common (Western) small-footed bat Myotis ciliolabrum uncommon Silver-haired bat Lasionycteris noctivagans uncommon Big brown bat Eptesicus fuscus pallidus rare Hoary bat Lasiurus cinereus cinereus rare FREE-TAILED BATS (MOLOSSIDAE) Brazilian (=Mexican) free-tailed Tadarida brasiliensis mexicana uncommon, bat migratory HARES & RABBITS (LEPORIDAE) Nuttall’s(=Mountain) Cottontail Sylvilagus nuttallii grangeri uncommon Black-tailed jackrabbit Lepus californicus rare SQUIRRELS, CHIPMUNKS & MARMOTS (SCIURIDAE) Least chipmunk Tamias minimus uncommon Rock squirrel Spermophilus variegatus common Townsend’s(=Piute) Spermophilus townsendii mollis uncommon ground squirrel Yellow-bellied marmot Marmota flaviventris uncommon (=Rockchuck) POCKET GOPHERS (GEOMYIDAE) Botta’s pocket gopher Thomomys bottae common Northern pocket gopher Thomomys talpoides common POCKET MICE (HETEROMYIDAE) Great Basin pocket mouse Perognathus parvus uncommon (continued, three pages) Mammals of the Jordan River, Potts, 08 cont. page 2 of 3 BEAVER (CASTORIDAE) American beaver Castor canadensis common RATS, MICE, HARVEST MICE, GRASSHOPPER MICE, WOODRATS, VOLES, MUSKRAT (CRICETIDAE) Western harvest mouse Reithrodontomys megalotis common Deer mouse Peromyscus maniculatus common Northern grasshopper mouse Onychomys leucogaster uncommon Bushy-tailed woodrat Neotoma cinerea rare Meadow vole Microtus pennsylvanicus modestus common Long-tailed vole Microtus longicaudus common Montane vole Microtus montanus uncommon Sagebrush vole Lagurus curatus common Common muskrat Ondatra zibethicus common Nutria Myocaster coypus rare, exotic Brown (=Norway) rat Rattus norvegicus norvegicus common, exotic, nuisance Black rat Rattus rattus alexandrinus common, exotic, nuisance House mouse Mus musculatus common, exotic, nuisance JUMPING MICE (ZAPODIDAE) Western jumping mouse Zapus princeps common PORCUPINES (ERETHIZONTIDAE) North American(=Common) Erethizon dorsatum uncommon porcupine COYOTES & FOXES (CANIDAE) Coyote Canis latrans uncommon Red fox Vulpes vulpes macroura common RACCOON (PROCYONIDAE) Common Raccoon Procyon lotor pallidus common, exotic, nuisance (continued) Mammals of the Jordan River, Potts, 08 cont. page 3 of 3 CATS (FELIDAE) Mountain lion (=Cougar, Puma) Felis concolor rare Bobcat Lynx rufus uncommon BADGERS, SKUNKS, MINK & WEASELS (MUSTELIDAE) American Badger Taxidea taxus uncommon Western spotted skunk Spilogale gracilis gracilis common Striped skunk Mephitis mephitis common American mink Mustela vison energumenos uncommon Long-tailed weasel Mustela frenata nevadensis common Short-tailed weasel (=Ermine) Mustela erminea muricus uncommon DEER (CERVIDAE) Mule deer Odocoileus hemionus uncommon Rocky Mountain Elk (=Wapiti) Cervus elaphus nelsoni rare Shiras moose Alces alces shirasi rare Ecology Herbivorous mice, voles, and gophers have the greatest ecological impact along the Jordan River corridor through their sheer numbers. The two common, obligate water rodents beaver and muskrat would be next in importance, as both influence the Jordan with their significant impacts to vegetation and river banks with their feeding habits, runways and burrows in the banks. These are followed in importance by the insectivorous bats and shrews. The larger animals like deer and a variety of predators are far less common in the highly urbanized areas, as they do not generally get along well with humans in the corridor. Skunks and red fox are classic problematic native species. Introduced exotic mammals have become quite a nuisance along the corridor. The most notable of these pests are rats and house mice that thrive in most areas inhabited by humans. Raccoons are another “habituated” exotic that have become more recent pests in the area. Domesticated animals such as dogs, house cats, horses, etc. were not included on this list although they are extremely common along the river corridor, mostly associated with humans. It is significant that feral dogs and cats are responsible for the demise of many different kinds of fauna along the river. Dogs are especially damaging to larger vertebrates, and cats are especially hard on smaller mammals and migratory neo-tropical birds. References: Mammals of the Intermountain West, S. I. Zeveloff, University of Utah Press, 1988, 365 pp. Inventory of the Vertebrates of the River State Park, Utah Division of Wildlife Resources report, 2003, 19 pp..
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